Michael Bayne
b6f5317ad2
git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@158 ed5b42cb-e716-0410-a449-f6a68f950b19
64 lines
2.0 KiB
Java
64 lines
2.0 KiB
Java
//
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// $Id$
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//
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// Nenya library - tools for developing networked games
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// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/nenya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.jme.util;
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import com.jme.scene.Node;
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import com.jme.scene.Spatial;
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/**
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* Performs a depth-first scene graph traversal looking for {@link Spatial}s
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* of a given class.
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*/
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public abstract class SpatialVisitor<T extends Spatial>
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{
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public SpatialVisitor (Class<T> type)
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{
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_type = type;
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}
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/**
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* Traverses the given node in depth-first order, calling {@link #visit}
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* for each {@link Spatial} of the configured class encountered.
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*/
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public void traverse (Spatial spatial)
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{
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if (_type.isInstance(spatial)) {
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visit(_type.cast(spatial));
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}
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if (spatial instanceof Node) {
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Node node = (Node)spatial;
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for (int ii = 0, nn = node.getQuantity(); ii < nn; ii++) {
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traverse(node.getChild(ii));
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}
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}
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}
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/**
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* Called once for each {@link Spatial} of the configured class in the
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* scene graph.
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*/
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protected abstract void visit (T child);
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/** The type of spatial of interest. */
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protected Class<T> _type;
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}
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